NEBS-compliant earth connection

When you install enclosures into a Network Equipment-Building System (NEBS) compliant installation, each enclosure must have a reliable electrical earth connection that is separate to any earth connections provided by power supply cables.

On Storwize® V3500 enclosures, this connection is made by using the front enclosure mounting screws that are part of the standard installation described in Installing the support rails and Installing the enclosure. To provide a reliable electrical earth connection, the upright mounting rails of the racks into which enclosures are installed must meet the following requirements before installing the support rails and enclosures:
  • Upright mounting rails must not be painted, oxidized or otherwise insulated from the enclosure flanges and mounting rails. If paint, oxidization or other insulation is present, it must be removed and the metal must be brought to a bright, non-corroding finish.
  • Upright mounting rails must have their own NEBS-compliant connection to earth, independent of the earth connections provided by any power supply cables.
Notes:
  1. If the Storwize V3500 system is required to be NEBS-compliant, some system configuration settings must be made. For details, see Configuring a Storwize V3500 system to be NEBS-compliant.
  2. For more information about Storwize V3500 configuration guidelines and restrictions, see the following website: http://www-01.ibm.com/support/docview.wss?uid=ssg1S1005421